ETSI EN 300 453

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ETSI EN 300 453 English PDF Access and Terminals (AT); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Terminal equipment interface

standard published 07/01/2001 by European Telecommunications Standards Institute

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Specification of the terminal equipment side of the interface and test procedures for compliance. Revision of ETS 300 453 to improve the safety related text following a liaison received from TC Safety.